Thomas shaw



(No Model.)

T. SHAW.

. TELEGRAPH WIRE.

No.28-9,575. Patented"De0.4,188'3.

UNITE-D STATES PATENT OFFICE.

THOMAS sHAW, 0F NEWARK, NEW JERSEY.

TELEGRAPH-WIRE.

SPECIFICATION forming part of Letters Patent No. 289,575, dated December 4,1883.

Application filed September 26,1883. (No model.)

To all whom it may concern Be it known that I, THoMAs SHAW, a citizen of the United States, residing at Newark, in the county of Essex and State of New J ersey, have invented certain new and useful Improvements in Telegraph-Wire; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of this invention is to provide a telegraphwire of increased durability, tensile strength, and conductivityyand it consists in the arrangements and combinations of parts, all substantially as will be hereinafter set forth, and finally embodied in the claims.

Referring to the accompanying drawings, in which'like letters of reference indicate corresponding parts in each of the figures, Figure l is aview of awire in course of manufacture; Fig. 2, a completed portion, and Fig. 3 a view taken through line X. y

In carrying out the invention I arrange a series of tubular sections, a a, upon a length of steel or other metallic wire, which tubular sections are screwed together at their extremities, forming a continuous tube, said sections being previously prepared by having a screwthread, 0, out on one extremity, and the opposite extremity bored out and a female thread cut therein, all as will be understood upon reference to the figures of the drawings. The tube and wire are then together drawn through a draw-plate and the parts brought to a perfect union, the diameter of the wire being somewhat reduced and the tubular portion considerably lengthened. Where the screwjoint was first formed, the drawing process makes such a perfect union of parts as that the metal will be practically integral, so that the strength of a single continuous tube will be gained and the joint will-be perfectly im- 5 pervious to moisture, thus rendering a subsequent soldering or tinning process unnecessary.

The wire as a whole, thus formed, having no longitudinal seams or joints, may be twisted without danger of exposing the corrosive metal within, so that said wire possesses great durability, the tensile strength of the steel not being diminished by rust or the conductivity of the copper reduced or impaired.

Having thus described my invention, what I claim as new is 1. The telegraph-wire composed of a. corewire. I), and a series of tubular sections, a a, secured together at their extremities and drawn into one continuous tube, substantially as set forth.

2. A telegraph-wire composed of a corewire and a series of tubular sections having THOMAS SHAW.

Witnesses:

OHARLEs H. PELL, OLIVER DRAKE. 

